restructured manifest and plugins loading; updated plugins

plugins/youtube_download/yt_dlp/downloader/common.py

@@ -62,7 +62,6 @@ class FileDownloader:
     test:               Download only first bytes to test the downloader.
     min_filesize:       Skip files smaller than this size
     max_filesize:       Skip files larger than this size
-    xattr_set_filesize: Set ytdl.filesize user xattribute with expected size.
     progress_delta:     The minimum time between progress output, in seconds
     external_downloader_args:  A dictionary of downloader keys (in lower case)
                         and a list of additional command-line arguments for the
@@ -455,14 +454,26 @@ class FileDownloader:
                 self._finish_multiline_status()
                 return True, False
 
+        sleep_note = ''
         if subtitle:
             sleep_interval = self.params.get('sleep_interval_subtitles') or 0
         else:
             min_sleep_interval = self.params.get('sleep_interval') or 0
+            max_sleep_interval = self.params.get('max_sleep_interval') or 0
+
+            if available_at := info_dict.get('available_at'):
+                forced_sleep_interval = available_at - int(time.time())
+                if forced_sleep_interval > min_sleep_interval:
+                    sleep_note = 'as required by the site'
+                    min_sleep_interval = forced_sleep_interval
+                if forced_sleep_interval > max_sleep_interval:
+                    max_sleep_interval = forced_sleep_interval
+
             sleep_interval = random.uniform(
-                min_sleep_interval, self.params.get('max_sleep_interval') or min_sleep_interval)
+                min_sleep_interval, max_sleep_interval or min_sleep_interval)
+
         if sleep_interval > 0:
-            self.to_screen(f'[download] Sleeping {sleep_interval:.2f} seconds ...')
+            self.to_screen(f'[download] Sleeping {sleep_interval:.2f} seconds {sleep_note}...')
             time.sleep(sleep_interval)
 
         ret = self.real_download(filename, info_dict)
@@ -495,3 +506,14 @@ class FileDownloader:
             exe = os.path.basename(args[0])
 
         self.write_debug(f'{exe} command line: {shell_quote(args)}')
+
+    def _get_impersonate_target(self, info_dict):
+        impersonate = info_dict.get('impersonate')
+        if impersonate is None:
+            return None
+        available_target, requested_targets = self.ydl._parse_impersonate_targets(impersonate)
+        if available_target:
+            return available_target
+        elif requested_targets:
+            self.report_warning(self.ydl._unavailable_targets_message(requested_targets))
+        return None